Rolling-mill



" Sheets-Sheet l J. M. BAKER.

ROLLING MILL.

tented J-u (No Model.) 3 Sheets-Sheet 2.

J. M. BAKER,

ROLLING MILL.

No 23,100. Patented July 28, 1885.

INVENTOR (No Model.)

J. M. BAKER. ROLLING MILL.

n n n n n n n nn 3 Sheets-Sheet 3.

UNITED STATES PATENT OFFICE.

J QHN M. BAKER, OF ALLENTO'WN, PENNSYLVANIA.

ROLLING-MILL.

SPECIFICATION forming part of Letters Patent No. 323,100, dated July 28, 1885. Application filed Jnly28,1884. (No moat-1.)

To all whom it may concern:

Be it known that I, JOHN M. BAKER, a citizen of the United States, and a resident of Allentown, Lehigh county, Pennsylvania, haveinvented certain Improvements in Rolling- Mills, of which the following is a specification.

My improvements are based upon .the invention for which I obtained Letters Patent No. 249,871, dated November 22, 1881, the object of my present improvements being to so construct the rolling-mill that a bloom will be rapidly converted into a strip, and the latter coiled into a firmly welded and homogeneous ring. This object I attain in the manner hereinafter set forth, reference being had to the accompanying drawings,in which Figure 1, Sheet 1, is a longitudinal section of the rolling-mill with my improvements; Fig. 2, Sheet 2, a plan view of the same; Fig. 3, Sheet 3, an end View looking in the direc tion of the arrow, Fig. 2, but with the drivingshaft in section; Fig. 4, a section on the line 1 2, Fig. 3; Fig. 5, a section of the lower coiling-roll on a larger scalethan the other figures, and Fig. 6 a perspective view illustrating a feature in the construction of said lower coiling-roll.

The mill comprises three pairs of reducingrolls, A A, B B, and D D, and a pair of coiling-rolls, F F. The shaft A of the lower roll, A, is driven by means of bevel-gears A and A from the main shaft G, to which power is applied by belts or in any other suitable manner, the shafts B and D of the rolls B and D being similarly driven by bevel gears B B* and D D, and the upper rolls being driven from the lower rolls by spui gearing a, Z), and d, as shown in Fig. 2.

The upper rolls, A and D, have grooves a and d, and the lower rolls, A and D, have ribs a and d adapted to said grooves; but in the central pair of rolls this arrangement is reversed, the rib I) being formed upon the upper roll, B, and the groove b in the lower roll, B. The object of thus reversing the ribs and grooves is to remove from the strip the fin formed upon its edges by the joint between the rolls; thus, as the bloom passes betweenthe rolls A A, it will have a fin formed upon its lower edges, which fin will be removed as the strip passes between the rolls B B, and

the fin formed on the strip by the rolls B B will be removed by the rolls D D.

Guide-troughs Hserve to direct the strip in its passage between the rolls, so that no handling of the strip is required.

The lower coilingroll, F, is made in two parts, divided in the present instance centrally through the groove f, the shaft F of one-half of the roll being adapted to bearings in suitable housings, and being driven from the shaft G by bevelgears F F F carrying the other half of the roll, is free to slide in housings opposite those of the shaft F, the sliding of the shaft and its roll being effected by an arm, I, on a rock-shaft, I, and other arms, .1 which are connected by rods 1) tojointed links h h, the ends of the links h being hung to lugs t on the housing, and the ends of the links hto a sleeve, k,which is confined to an annular collar on the shaft F so that While the latter is free to turn independently of the collar it must move longitudinally in both directions with the latter.

The shaft F and its roll are driven from the roll carried by the shaft F both portions of the roll having grooves s, Fig. 6, and lugs t, on one part of the roll projecting into the groove of the other part, as shown by Fig. 5,

so that the roll of the shaft F is driven from the opposite portion of the roll by contact of the lugs t of the two halves.

Each half of the rollhas an under-cut groove, to, into which the front end of the strip is laterally expanded as said front end enters the rolls, thus insuring the carrying around of the end of the strip by the roll and the proper coiling of the same.

The upper roll has a rib, f, to enter the groove f of the lower roll, and the bearings J of said upper roll are movable vertically under control of the springs K, so that as the strip is coiled the upper roll can rise, the coils being pressed together, owing to the action of the springs on the boxes J. The boxes rise until they come into contact with springs m The shaft carried by the lower ends of set-screws M in the roll-housings, these springs being much stiffer than the springs K, so that as the strip enters the rolls after the boxes J come into contact with the springs m, the further rise of the boxes causes the compression of said springs, and a ICO powerful welding-pressure is exerted upon the ring during and after the winding of the final coil thereupon.

The boxes may, if desired, be stopped by direct contact with the set-screws without the interposition of the springs;but the use of the latter is preferable, as it prevents the undue straining of the housings and other framework.

The upper roll, F, is driven from theshaft of the upper roll, D, by belts 9", adapted to pulleys g on the shaft of said roll D, and to similar pulleys g, on the shaft of the roll F, thus permitting the rise of the latter without any interference with its proper rotation.

It will be observed, on reference to Fig. 2, that the bevel-gears, whereby the shafts of the various rolls aredriven from the shaft G, are

so proportioned that there will be an increased speed of the rolls D D over the rolls B B, and of the latter over the rolls A A, so as to effect the proper reduction of the bloom into a thin strip before reaching the coiling-rolls.

The lower coilingroll, F, is divided, as in the machine shown in my former patent, in order to permit the discharge of the coiled ring from the roll; but in the present case the projections on the halves of said lower roll,F, are beveled, so that the outer portion of the roll can be readily withdrawn from the coiled ring, and the latter readily discharged from the inner half of the roll.

The roll need not be divided in the center, as shown, as the projection may, if desired, be formed entirely on the portion of the roll carried by the shaft F. The construction shown, however, is preferred.

The halves of the roll can be separated to admit a wider strip, the lugs i, to which are hung the links h, being adjustable so that the throw of the movable half of the roll can be regulated to suit this variation in width.

It will be noticed that the pressure of the springs K upon the boxes of the upper roll is a comparatively light one, and is practically uniform throughout the coiling of the strips,

1. The combination of the lower coiling roll, the upper yielding-roll, the pressuresprings K therefor, and a stop independent of said springs for limiting the upward yielding of the roll, as set forth.

2. The combination of the lower coilingroll, the upper roll having yielding bearings, the pressure-springs K therefor,and an elastic stop independent of said springs for limiting the movement of the roll, as set forth.

3. The combination of the driven shaft F carrying part of the lower coiling-roll, the dead-shaft F carrying the other part of the same, and a clutch, whereby the .two parts of the roll are connected and caused to rotate together, as specified.

4. The combination of the shaft F",carrying part of the lower coiling-roll, the shaft F, carrying the other part of the roll, the sleeve 70, the links h h, the rock-shaft I and its arms, as specified. i

5. The lower coiling-roll,F,having agroove with undercut recess 10, as set forth.

6. The combination of the roll D, the lower coiling-roll, F, the upper coiling-roll, F, having yielding bearings, and the belts whereby said rollis driven from the spindle of the roll D, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' JOHN M. BAKER. \Vitnesses:

SAMUEL P. SwAR'rz, JOHN BRIsLIN. 

